Naoki Kikuchi

Prebaked Anode from Coal Extract (3) — Carbonization Properties of Hypercoal and Its Blends with Binder Pitch

The preparation of prebaked anodes from coal using solvent extraction technology was investigated. Several bituminous coals were extracted with methylnaphthalene-based solvent under pressurized nitrogen atmosphere at 653K, and ash-free and high purity coal extract (Hypercoal, HPC) was obtained. It was found that the HPC can be utilized as an additive for binder pitch of anode manufacturing; the HPC improves the coke yield of the pitch and reduces the ash content of the binder. It was also found that a suitable modified HPC was self-sinterable, and was successfully molded and carbonized without binder pitch to result of dense carbon specimen. These results suggest the possibility for coal-based raw materials for prebaked anodes